Hah...I was waiting for your brother (the other Mr. Anderson) to post because there is a classic route with a mono on it just down the way that I figured he must have done. You're on the right track with the rock type. Hint: the crag is in an "enchanting" state.

Edit: If you need a further hint, the face climb to the immediate left of me has no bolts because it was originally led with tri-cams for protection.